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kiruha [24]
3 years ago
6

NEED DONE ASAP!!

Mathematics
1 answer:
almond37 [142]3 years ago
3 0

Answer:

A. 3x^2 + 4 = 52

     3x^2 = 52 - 4

     3x^2 = 48

       x^2 = 48/3

       x^2 = 16

        x    = \sqrt{16}

        x = 4

B. x^2 - 121 = 0

     x^2  = 121

       x = \sqrt{121}

       x = 11

C. (b + 4 )2 = 49

    2b + 8 = 49

    2b  = 49 - 8

     2b = 41

        b = 41/2

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Find the midpoint of the line segment with the endpoints (1, 0) and (2, -10).
Mariulka [41]

Answer:

\bigl(\frac{3}{2},-5\bigr)

or in decimal form

(1.5,-5)

Step-by-step explanation:

The midpoint of the line with endpoints (x_1,y_1) and (x_2,y_2) is \bigl(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\bigr). just take the average between the points

so given the points (1,0) and (2,-10)

x_1=1

y_1=0

x_2=2

y_2=-10

the midpoint is found as follows:

\bigl(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\bigr)

\bigl(\frac{1+2}{2},\frac{0-10}{2}\bigr)

\bigl(\frac{3}{2},\frac{-10}{2}\bigr)

\bigl(\frac{3}{2},-5\bigr)

or in decimal form

(1.5,-5)

7 0
3 years ago
Can someone walk me through the steps: Steve increases his math average by 9 points over a period of 15 weeks. How many points p
ozzi

hmmm units rates are just a matter of one above the other.

in this case is points/week.

9/15  points/weeks, we can just divide 9 ÷ 15 = 0.6, or 3/5.

so 0.6 points/weeks.

4 0
3 years ago
F(x)=1/x and g(x)=x-4<br> Can you evaulate (g o f)(0) explai sn why or why not
Ostrovityanka [42]

Hello from MrBillDoesMath!

Answer:

 (g o f)(0) cannot be evaluated

Discussion:

(g o f)(0) = g ( f(0))  if it exists but f(0) is not defined (as division by zero is not defined) so   (g o f)(0) cannot be evaluated

Thank you,

MrB

7 0
3 years ago
Hat is the value of x in the equation 3 x minus 4 y equals 65, when y equals 4?
kobusy [5.1K]

Answer:

16.3 repeating

Step-by-step explanation:

3x-4(4)=65

3x-16=65

3x=65-16

3x=49

x=49/3

x=16.3 repeating

8 0
2 years ago
A dental filling is 9 carats. what percent of the filling is gold?
alexandr1967 [171]

Answer:

Lower than 50%

Step-by-step explanation:

3 0
2 years ago
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